Shaft transducer having DC output proportional to angular veloci

Details Shaft transducer having DC output proportional to angular veloci Shaft transducer having DC output proportional to angular veloci

1982-02-19

1984-04-17

Miller, J. D.

Electrical generator or motor structure

Dynamoelectric

Rotary

310 68B, 310154, 335222, H02K 1732

Patent

active

044437242

ABSTRACT:
A brushless DC tachometer is disclosed that includes a high strength toroidal permanent magnet (25) for providing a uniform magnetic field in an air gap, an annular pole piece (21) opposite the magnet, and a pickup coil (19) wound around the pole piece (21) and rotating about the axis of the pole piece. The pickup coil is rotated by an input shaft (15) to which the coil (19) is coupled with a friction clip. The output of the coil (19) is conducted to circuitry (31) by a twisted wire pair (29). The input shaft (15) also activates a position transducing potentiometer (13).

REFERENCES:
patent: 3418612 (1968-12-01), Beckwith
patent: 3529191 (1970-09-01), Baudot
patent: 3546508 (1970-12-01), Harvey
patent: 3610974 (1971-10-01), Kenyon
patent: 3611222 (1971-10-01), Sauvignet
patent: 3665227 (1972-05-01), Busch
patent: 3882366 (1975-05-01), Clunis
patent: 3976965 (1976-08-01), Remus
patent: 4188556 (1980-02-01), Hahn
patent: 4292557 (1981-09-01), Kishi
Loeb, L. B., Fundamentals of Electricity & Magnetism, 1931, Chapman, pp. 108-109.

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